Does anyone know whether this idea (published in the 100th Anniversary issue of American Bicyclist and Motorcyclist in December, 1979) was ever developed? It won first prize in the "Bikes of the Future" design competition sponsored by the British Cycling Bureau.

It's described as "extra-foldable, collapsing into a 17-inch-wide shell-like package. Reinforced plastic mudguards serve as bike carrying case. Features protected shaft drive."

I assume the shaft drive means it's fixed gear. By any measure it would seem to qualify as a really tiny folder.